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sensors Mode-S transponder

AD9D79

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N97681 · CESSNA 172 Skyhawk · operated by BUIQUI AEROSPACE CORP

Hex
AD9D79
Octal
53316571
Decimal
11,378,041
Country
US
Tail
N97681
Type
C172
No current signal · last broadcast 21h ago
Flights observed
141
Distinct callsigns
1
Country
US
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S AD9D79.

Country allocation

The ICAO 24-bit address AD9D79 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
N97681 - 141 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N97681 - Jul 13, 21:55 UTCJul 13, 22:40 UTC45m
2026-07-13 N97681 - Jul 13, 16:50 UTCJul 13, 17:40 UTC50m
2026-07-13 N97681 - Jul 13, 15:20 UTCJul 13, 15:55 UTC35m
2026-07-13 N97681 - Jul 13, 14:40 UTCJul 13, 14:45 UTC5m
2026-07-13 N97681 SIG → SIG Jul 13, 11:55 UTCJul 13, 13:50 UTC1h 55m
2026-07-12 N97681 - Jul 12, 18:20 UTCJul 12, 19:15 UTC55m
2026-07-12 N97681 - Jul 12, 15:35 UTCJul 12, 15:45 UTC10m
2026-07-12 N97681 - Jul 12, 13:40 UTCJul 12, 13:55 UTC15m
2026-07-12 N97681 - Jul 12, 12:55 UTCJul 12, 13:05 UTC10m
2026-07-11 N97681 - Jul 11, 20:30 UTCJul 11, 20:40 UTC10m
2026-07-11 N97681 SIG → SIG Jul 11, 18:00 UTCJul 11, 18:45 UTC45m
2026-07-11 N97681 - Jul 11, 16:20 UTCJul 11, 16:35 UTC15m
2026-07-11 N97681 - Jul 11, 13:50 UTCJul 11, 14:00 UTC10m
2026-07-11 N97681 - Jul 11, 11:35 UTCJul 11, 12:20 UTC45m
2026-07-09 N97681 - Jul 9, 01:50 UTCJul 9, 02:00 UTC10m
2026-07-09 N97681 - Jul 9, 00:25 UTCJul 9, 00:35 UTC10m
2026-07-08 N97681 - Jul 8, 20:15 UTCJul 8, 20:25 UTC10m
2026-07-08 N97681 - Jul 8, 19:35 UTCJul 8, 19:40 UTC5m
2026-07-08 N97681 - Jul 8, 13:20 UTCJul 8, 13:55 UTC35m
2026-07-08 N97681 - Jul 8, 09:35 UTCJul 8, 10:10 UTC35m
2026-07-08 N97681 - Jul 8, 00:05 UTCJul 8, 01:40 UTC1h 35m
2026-07-07 N97681 - Jul 7, 15:45 UTCJul 7, 16:10 UTC25m
2026-07-06 N97681 - Jul 6, 18:50 UTCJul 6, 19:35 UTC45m
2026-07-06 N97681 - Jul 6, 14:40 UTCJul 6, 15:35 UTC55m
2026-07-06 N97681 - Jul 6, 13:00 UTCJul 6, 13:50 UTC50m
2026-07-05 N97681 - Jul 5, 16:05 UTCJul 5, 17:05 UTC1h 0m
2026-07-05 N97681 - Jul 5, 13:55 UTCJul 5, 14:05 UTC10m
2026-07-04 N97681 - Jul 4, 11:50 UTCJul 4, 12:20 UTC30m
2026-07-03 N97681 - Jul 3, 21:50 UTCJul 3, 22:45 UTC55m
2026-07-03 N97681 - Jul 3, 15:00 UTCJul 3, 15:20 UTC20m
2026-07-03 N97681 SIG → SIG Jul 3, 11:45 UTCJul 3, 12:35 UTC50m
2026-07-02 N97681 - Jul 2, 16:00 UTCJul 2, 16:50 UTC50m
2026-07-02 N97681 - Jul 2, 13:40 UTCJul 2, 14:00 UTC20m
2026-07-01 N97681 - Jul 1, 18:40 UTCJul 1, 19:40 UTC1h 0m
2026-07-01 N97681 - Jul 1, 16:45 UTCJul 1, 17:35 UTC50m
2026-07-01 N97681 - Jul 1, 15:50 UTCJul 1, 16:00 UTC10m
2026-07-01 N97681 - Jul 1, 14:15 UTCJul 1, 14:35 UTC20m
2026-07-01 N97681 - Jul 1, 13:20 UTCJul 1, 13:35 UTC15m
2026-06-30 N97681 - Jun 30, 19:30 UTCJun 30, 19:55 UTC25m
2026-06-30 N97681 - Jun 30, 18:35 UTCJun 30, 18:45 UTC10m
2026-06-30 N97681 - Jun 30, 16:30 UTCJun 30, 16:40 UTC10m
2026-06-30 N97681 - Jun 30, 13:40 UTCJun 30, 14:35 UTC55m
2026-06-30 N97681 - Jun 30, 11:35 UTCJun 30, 11:45 UTC10m
2026-06-28 N97681 - Jun 28, 14:14 UTCJun 28, 15:20 UTC1h 5m
2026-06-27 N97681 - Jun 27, 20:14 UTCJun 27, 20:24 UTC10m
2026-06-27 N97681 - Jun 27, 18:39 UTCJun 27, 19:00 UTC20m
2026-06-26 N97681 - Jun 26, 21:35 UTCJun 26, 21:45 UTC10m
2026-06-26 N97681 - Jun 26, 18:44 UTCJun 26, 18:54 UTC10m
2026-06-26 N97681 - Jun 26, 15:39 UTCJun 26, 16:49 UTC1h 10m
2026-06-26 N97681 - Jun 26, 13:30 UTCJun 26, 13:45 UTC15m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N97681 page for operator, model, and routing details .

Mode-S AD9D79 frequently asked

What is Mode-S code AD9D79?
AD9D79 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N97681.
Where is Mode-S AD9D79 registered?
Mode-S code AD9D79 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is AD9D79 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD9D79, octal 53316571, decimal 11,378,041.
What flights does AD9D79 operate?
Mode-S AD9D79 has broadcast 1 distinct callsign, including N97681.